ES2350921T3 - Chapa de acero galvanizado por inmersión en caliente basado en cinc excelente en la retención de brillo. - Google Patents
Chapa de acero galvanizado por inmersión en caliente basado en cinc excelente en la retención de brillo. Download PDFInfo
- Publication number
- ES2350921T3 ES2350921T3 ES02755638T ES02755638T ES2350921T3 ES 2350921 T3 ES2350921 T3 ES 2350921T3 ES 02755638 T ES02755638 T ES 02755638T ES 02755638 T ES02755638 T ES 02755638T ES 2350921 T3 ES2350921 T3 ES 2350921T3
- Authority
- ES
- Spain
- Prior art keywords
- water
- plating
- band
- temperature
- zone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000014759 maintenance of location Effects 0.000 title claims abstract description 15
- 238000007654 immersion Methods 0.000 title description 15
- 238000007747 plating Methods 0.000 claims abstract description 129
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 122
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 97
- 239000010959 steel Substances 0.000 claims abstract description 97
- 238000001816 cooling Methods 0.000 claims abstract description 58
- 238000010791 quenching Methods 0.000 claims abstract description 52
- 230000000171 quenching effect Effects 0.000 claims abstract description 46
- 239000002932 luster Substances 0.000 claims abstract description 45
- 230000015556 catabolic process Effects 0.000 claims abstract description 37
- 238000006731 degradation reaction Methods 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 24
- 239000000126 substance Substances 0.000 claims abstract description 17
- 238000007598 dipping method Methods 0.000 claims abstract description 12
- 239000012535 impurity Substances 0.000 claims abstract description 10
- 230000001590 oxidative effect Effects 0.000 claims description 24
- 229910052727 yttrium Inorganic materials 0.000 claims description 9
- 229910052726 zirconium Inorganic materials 0.000 claims description 9
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 7
- 229910052749 magnesium Inorganic materials 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 abstract description 10
- 229910052796 boron Inorganic materials 0.000 abstract description 9
- 229910052719 titanium Inorganic materials 0.000 abstract description 9
- 239000011777 magnesium Substances 0.000 description 73
- 239000010410 layer Substances 0.000 description 69
- 239000011701 zinc Substances 0.000 description 62
- 230000005496 eutectics Effects 0.000 description 18
- 229910052751 metal Inorganic materials 0.000 description 18
- 239000002184 metal Substances 0.000 description 18
- 238000004519 manufacturing process Methods 0.000 description 14
- 230000007797 corrosion Effects 0.000 description 12
- 238000005260 corrosion Methods 0.000 description 12
- 229910018134 Al-Mg Inorganic materials 0.000 description 11
- 229910018467 Al—Mg Inorganic materials 0.000 description 11
- 239000011159 matrix material Substances 0.000 description 11
- 238000007711 solidification Methods 0.000 description 10
- 230000008023 solidification Effects 0.000 description 10
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 9
- 239000011248 coating agent Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 9
- 239000007921 spray Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 239000012530 fluid Substances 0.000 description 7
- 230000002401 inhibitory effect Effects 0.000 description 7
- 239000002344 surface layer Substances 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 238000005496 tempering Methods 0.000 description 6
- 230000003247 decreasing effect Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000003595 mist Substances 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000007761 roller coating Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 238000002845 discoloration Methods 0.000 description 2
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910002706 AlOOH Inorganic materials 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 229910019018 Mg 2 Si Inorganic materials 0.000 description 1
- 229910019641 Mg2 Si Inorganic materials 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 238000007739 conversion coating Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- RXCBCUJUGULOGC-UHFFFAOYSA-H dipotassium;tetrafluorotitanium;difluoride Chemical compound [F-].[F-].[F-].[F-].[F-].[F-].[K+].[K+].[Ti+4] RXCBCUJUGULOGC-UHFFFAOYSA-H 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- GVALZJMUIHGIMD-UHFFFAOYSA-H magnesium phosphate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GVALZJMUIHGIMD-UHFFFAOYSA-H 0.000 description 1
- 229960002261 magnesium phosphate Drugs 0.000 description 1
- 229910000157 magnesium phosphate Inorganic materials 0.000 description 1
- 239000004137 magnesium phosphate Substances 0.000 description 1
- 235000010994 magnesium phosphates Nutrition 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000006557 surface reaction Methods 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- OMQSJNWFFJOIMO-UHFFFAOYSA-J zirconium tetrafluoride Chemical compound F[Zr](F)(F)F OMQSJNWFFJOIMO-UHFFFAOYSA-J 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
- C22C18/04—Alloys based on zinc with aluminium as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
- C23C2/24—Removing excess of molten coatings; Controlling or regulating the coating thickness using magnetic or electric fields
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/26—After-treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Coating With Molten Metal (AREA)
- Laminated Bodies (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2002/007485 WO2004009863A1 (ja) | 2002-07-24 | 2002-07-24 | 光沢保持性の良好な溶融Ｚｎ基めっき鋼板およびその製造法 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES2350921T3 true ES2350921T3 (es) | 2011-01-28 |
Family
ID=30490773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES02755638T Expired - Lifetime ES2350921T3 (es) | 2002-07-24 | 2002-07-24 | Chapa de acero galvanizado por inmersión en caliente basado en cinc excelente en la retención de brillo. |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP1524326B1 (de) |
| CN (1) | CN1276990C (de) |
| AT (1) | ATE484605T1 (de) |
| AU (1) | AU2002323927B2 (de) |
| CA (1) | CA2444460C (de) |
| DE (1) | DE60238001D1 (de) |
| ES (1) | ES2350921T3 (de) |
| NZ (1) | NZ528816A (de) |
| WO (1) | WO2004009863A1 (de) |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100666693B1 (ko) | 2004-11-23 | 2007-01-11 | 삼성전자주식회사 | 모놀리식 듀플렉서 |
| CN102330043B (zh) * | 2011-08-03 | 2013-03-13 | 马鞍山鼎泰稀土新材料股份有限公司 | 一种钢丝热浸镀稀土锌合金及热浸镀方法 |
| CN103361588B (zh) * | 2012-03-30 | 2016-04-06 | 鞍钢股份有限公司 | 低铝低镁系锌铝镁镀层钢板生产方法及其镀层钢板 |
| WO2013160566A1 (fr) | 2012-04-25 | 2013-10-31 | Arcelormittal Investigacion Y Desarrollo, S.L. | Procédé de réalisation d'une tôle à revêtements znalmg huilés et tôle correspondante. |
| JP5097305B1 (ja) | 2012-04-25 | 2012-12-12 | 日新製鋼株式会社 | 黒色めっき鋼板 |
| AU2013332257A1 (en) | 2012-10-17 | 2015-04-09 | Bluescope Steel Limited | Method of producing metal-coated steel strip |
| TWI653362B (zh) | 2012-10-17 | 2019-03-11 | 澳大利亞商布魯史寇普鋼鐵有限公司 | 金屬被覆鋼帶的製造方法 |
| ES2807509T3 (es) | 2012-10-18 | 2021-02-23 | Bluescope Steel Ltd | Procedimiento de producción de banda de acero revestida con metal |
| EP2824213A1 (de) * | 2013-07-12 | 2015-01-14 | Voestalpine Stahl GmbH | Verfahren zur Verbesserung der Haftfähigkeit auf einem schutzbeschichteten Stahlblech |
| US10138538B2 (en) | 2013-12-20 | 2018-11-27 | Arcelormittal | ZnAlMg-coated metal sheet produced by optimized wiping |
| KR101767788B1 (ko) * | 2015-12-24 | 2017-08-14 | 주식회사 포스코 | 내마찰성 및 내백청성이 우수한 도금 강재 및 그 제조방법 |
| TW201804008A (zh) * | 2016-03-31 | 2018-02-01 | 日新製鋼股份有限公司 | 熔融鋁鍍鋼線的製造方法 |
| KR102031466B1 (ko) | 2017-12-26 | 2019-10-11 | 주식회사 포스코 | 표면품질 및 내식성이 우수한 아연합금도금강재 및 그 제조방법 |
| CN111989420B (zh) * | 2018-05-16 | 2022-11-08 | 日本制铁株式会社 | 镀覆钢材 |
| CN108977695B (zh) * | 2018-09-30 | 2020-12-01 | 济南大学 | 一种含钛和锑的热浸镀锌铝镁合金及其制备方法 |
| TWI691615B (zh) * | 2019-04-10 | 2020-04-21 | 中國鋼鐵股份有限公司 | 鍍鋅鋼片及其製造方法 |
| CN113025937B (zh) * | 2021-02-07 | 2023-03-17 | 首钢集团有限公司 | 一种热浸镀锌钢板及其制备方法 |
| CN112941417A (zh) * | 2021-03-03 | 2021-06-11 | 靖江新舟合金材料有限公司 | 一种合金镀层钢板及其生产方法 |
| CN113512691B (zh) * | 2021-03-11 | 2023-05-09 | 首钢集团有限公司 | 一种锌铝镁镀层钢及其制备方法 |
| CN113604765B (zh) * | 2021-10-09 | 2022-01-04 | 天津市弘仁金属材料有限公司 | 一种钢带热浸镀方法 |
| CN115261703A (zh) * | 2022-06-08 | 2022-11-01 | 日照宝华新材料有限公司 | 一种高耐蚀光伏支架用钢板的制造方法 |
| CN117265328A (zh) * | 2023-09-25 | 2023-12-22 | 常州大学 | 一种含B和Zr的SuperDyma合金及其制备方法 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2754126B2 (ja) * | 1992-11-26 | 1998-05-20 | 新日本製鐵株式会社 | 外観、耐経時黒変性、耐食性に優れる溶融Ｚｎ−Ａｌめっき鋼板 |
| JP3148542B2 (ja) * | 1995-01-11 | 2001-03-19 | 新日本製鐵株式会社 | 耐眩性の優れた溶融Ｚｎめっき鋼板 |
| JPH10265926A (ja) * | 1997-03-25 | 1998-10-06 | Nisshin Steel Co Ltd | 耐食性および表面外観の良好な溶融Ｚｎ−Ａｌ−Ｍｇめっき鋼帯の製造法 |
| JP3888784B2 (ja) * | 1998-09-21 | 2007-03-07 | 日新製鋼株式会社 | 溶融Ｚｎ基めっき鋼板のエッジしわ防止法 |
| JP2001295015A (ja) * | 2000-02-09 | 2001-10-26 | Nisshin Steel Co Ltd | 高Ａｌ含有溶融Ｚｎ−Ａｌ−Ｍｇ系めっき鋼板 |
| JP2002080952A (ja) * | 2000-06-29 | 2002-03-22 | Nisshin Steel Co Ltd | 耐食性に優れた住宅用資材および住宅部材 |
| JP2002146504A (ja) * | 2000-08-22 | 2002-05-22 | Nisshin Steel Co Ltd | 耐食性及び耐ホイスカ性に優れた電装用資材及び電装用部材 |
| JP2002187234A (ja) * | 2000-12-21 | 2002-07-02 | Nisshin Steel Co Ltd | 耐食性に優れた非クロム系塗装鋼板 |
| JP4064634B2 (ja) * | 2001-02-02 | 2008-03-19 | 日新製鋼株式会社 | 光沢保持性の良好な溶融Ｚｎ基めっき鋼板およびその製造法 |
-
2002
- 2002-07-24 ES ES02755638T patent/ES2350921T3/es not_active Expired - Lifetime
- 2002-07-24 CA CA002444460A patent/CA2444460C/en not_active Expired - Lifetime
- 2002-07-24 NZ NZ528816A patent/NZ528816A/en not_active IP Right Cessation
- 2002-07-24 AU AU2002323927A patent/AU2002323927B2/en not_active Expired
- 2002-07-24 WO PCT/JP2002/007485 patent/WO2004009863A1/ja not_active Ceased
- 2002-07-24 EP EP02755638A patent/EP1524326B1/de not_active Expired - Lifetime
- 2002-07-24 AT AT02755638T patent/ATE484605T1/de not_active IP Right Cessation
- 2002-07-24 CN CN02808369.5A patent/CN1276990C/zh not_active Expired - Lifetime
- 2002-07-24 DE DE60238001T patent/DE60238001D1/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| WO2004009863A1 (ja) | 2004-01-29 |
| ATE484605T1 (de) | 2010-10-15 |
| EP1524326B1 (de) | 2010-10-13 |
| DE60238001D1 (de) | 2010-11-25 |
| CN1503853A (zh) | 2004-06-09 |
| CA2444460A1 (en) | 2004-01-24 |
| EP1524326A4 (de) | 2006-09-13 |
| NZ528816A (en) | 2005-10-28 |
| AU2002323927A1 (en) | 2004-02-09 |
| CA2444460C (en) | 2008-01-22 |
| AU2002323927B2 (en) | 2005-08-25 |
| EP1524326A1 (de) | 2005-04-20 |
| CN1276990C (zh) | 2006-09-27 |
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